package com.funny.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.funny.springcloud.alibaba.feign.PaymentFeignService;
import com.funny.springcloud.entities.Payment;
import com.funny.springcloud.utils.R;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author FUNNYWUS
 * @date 2020/7/29
 */
@RestController
public class CircleBreakerController {

    public static  final  String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private PaymentFeignService paymentFeignService;

    @RequestMapping("/consumer/fallback/{id}")
    // @SentinelResource(value = "fallback")
    // @SentinelResource(value = "fallback",fallback = "handlerFallback")
    // @SentinelResource(value = "fallback",blockHandler = "blockHandler")
     @SentinelResource(value = "fallback",
             fallback = "handlerFallback",
             blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class})
    public R<Payment> fallback(@PathVariable Long id) {
        R<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id,R.class,id);

        if(id == 4){
            throw new IllegalArgumentException("IllegalArgument ,非法参数异常...");
        }else if(result.getData() == null) {
            throw new NullPointerException("NullPointerException,该ID没有对应记录，空指针异常");
        }

        return  result;
    }

    public R handlerFallback(@PathVariable Long id, Throwable e) {
        Payment payment = new Payment(id,"null");
        return new R(444,"异常handlerFallback，exception内容： " + e.getMessage(), payment);
    }


    public R blockHandler(@PathVariable Long id, BlockException e) {
        Payment payment = new Payment(id,"null");
        return new R(444,"blockHandler-sentinel 限流，BlockException： " + e.getMessage(), payment);
    }

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public R<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentFeignService.paymentSQL(id);
    }
}
